Rotary motor or compressor



Aug. 21, 1928. 1,681,583

G. GUTTNER ROTARY MOTOR OR COMPRESSOR Filed March 11, 1927 Fig.1

Patented Aug. 21, i 1928.

UNITED STATES 1,681,583 PATENT o FlcE;

' ROTARY Moron on comrnnsson;

Application filed March 11, 1927. Serial N0. 174,668, and in Germany Iarch29, 1926;

My invention relates to. rotary compressors and more particularlyto a rotary cornpressor having a cylindrical piston eccentrlcally disposed within a cylindrical casing or cylinder. 4 v 1 In the rotary compressors of this type as hitherto constructed and in which a movable separatin member or partition is provided between t e piston and the cylindrical casing for the purpose of dividing, at each revolution of the piston, the space between the piston and the casing into two compartments such as a suction chamber an ,a'compression chamber, the said movable member or partition is-usually arranged radially or even tangentially with relation to the piston.

In the rotary compressors of this character hitherto known, the said movable member is pivotally connected with the one part, say the casing, and adapted to engage in a slot .of the other part, say the piston, so as to be displaceable therein or, as an alternative, the movable member is firmly connected with the piston and adapted to engage in a revoluble retaining member or the like of the casing'so as to be displaceable or movable .tllGI'BlD,

The rotary compressors constructed as above indicated, however, are objectionable .for the reason that the movable separating member is subjected to excessive .stress or wear 'due to the pressure and strain exerted by the piston running over the plane of the separating member or, in other words, the 85 vacuum produced on the one side of the piston and the high overpressure on the other side thereof act to subject the separating member to bending and shearing stresses. Obviously the stresses thus produced in the separating member detrimentally affect the efiiciency and the life of the engine, especially as they tend to destruct. or injure the retaining member serving to guide the reciprocating separating member. structive tendency of the stresses entails the danger of premature wearing and, in fact, execessive wear of the guiding members is a matter of inherence in engines of the indicated type, particularly if they are run with high speeds, so that the engine will soon become useless on account of reduced efliciency or objectionable for noise and shocks. r j The object of my invention is to remedy this defect, and with this object in view I pivotally connect the separating member,'

The deaccording to the present invention, with both the piston and the cylindrical casing or cylinder, and further I construct theseparatlng member to form, so to say, an arc of a circle or sector adapted to snugly fit and embed in a suitable recess provided for the purpose in the inner face of the cylinder, so t at, on the one hand, the piston will be caused to run smoothly over the same with to which the same otherwise would be subected.

Another advantage resides, according to my invention, in that the improved separatfall within the true scope of said claims may be resorted to when found expedient.

.In the accompaniying drawings forming a part of this speci cation and showing or purposes of exemplification, a preferred form and manner in which the invention may be embodied and practised, but without limiting the claimed invention to such illus-' trative instance:

Figure 1 is a sectional view showing my invention as applied to a-rotary piston com- .pressor of substantially the conventional form;

Figure 2 is'a similar view but with the movable parts in a different position, and

Figure 3 is a view in top plan of a single part of the compressor.

The compressor illustrated in the drawings is of the usual type comprising a casing or cylinder a, a piston b therein, a shaft 0 supporting said piston, an eccentric d integral with the shaft and a separating member. According to my invention the latter is not pivotally connected to the casin in the manner hitherto practised nor a apted to gentle pressure and, on the other hand, the 'separatmg member will be prevented from reciprocating in a bearing space and from the injurious efiect of the sliding friction slide in a slot of the piston, or vice versa, but is pivotally connected with both the easing or cylinder a and the piston b and is constructed and arranged to serve at the same time as a positively controlled means forthe discharge of the compressed fluid medium. p

In the preferred embodiment shown the separating or dividing member comprises a main bod g shaped to form a sector and two cylin rical bodies or heads e and f integral therewith, the latter constituting two pivot pins for the connection with the casing and the piston, respectively, as will be clearly seen in the drawings. The casing a is recessed to from a seat h, see Figure 2, for the accommodation of the main body 9 so that the latter will snugly fit therein and,

when the piston will come to the positionshown in Figure l, the bottom face A: of the main body or sector 7 will be in full intimate contact with the bottom face Z of the recess or seat h while the top face 2' of .the sector will be in a like contact with the peripheral face ofthe piston.

As thus far explained, it will be apparent that, in synchronism with the up and down movements of the piston, also the described separating member will reciprocate or move from the position shown in Figure 1 to that illustrated in Figure 2, as w1ll be readily understood by those skilled in the art so that it seems unnecessary to explain the operation of the compressor more in-detail.

I shall now proceed to describe the means provided in the compressor and more particularly in the separating memberfor the discharge of the compressed medium. In the end face a of the main body 9 there are provided a, series of openings of preferably varying or stepped sectional area and these openings extend through the body 9 to form passages on leading or discharging, on the bottom face is of. the body g, into the recess h, as. will be seen in Figure 2. I desire to have it understood, however, that the particular member and shape of the passages m shown is simply one which has commended itself to me, but which is not at all necessary, sinceeven a single passage of adequate sectional area will sufl'ice in some cases for the purpose in view. The recess h is in communication with the discharging passage owing to the provision of a passage p in the base of the engine so that the fluid medium wlll be discharged through the passages as indicated by arrows o in Figure 2, whereas when the piston adopts the position shown in Figure 1 the passages will be closed, the end face n of the recess co-operating with the end face a of the recess to seal or control the passages me n It will be seen that the usual discharge valve is entirely dispensed with and in substitution therefor the separating member is a separating member of sector shape for provided with passages or channels to constitute a ositively controlled discharging element a ording the advantage of giving 'the working fluid to be discharged, prior to the termination of the compression stroke or. phase, a pressure of any desirable degree. Thus, if the passages on are arranged in a. stepped manner, that is to say, of gradually increased or decreased cross-section, as shown in Figure 3, so that the majority thereof will act to close ere the highest degree of compression is attained, itwill be possible to ensure any desirable final pressure up to the end of the piston stroke by reducingthe cross-section of the passages 210- so eordingly,

What I claim is 1. A rotary motor or compressor, comprising a cylinder, an eccentric piston therein, a separating member of sector shape for dividing the free space of the cylinder into a suction compartment and a compression compartment at each revolution of the piston and allowingthecompressed fluid to be discharged'and cylindrical heads forming the two ends of said member for pivotal connection with the cylinder and the piston, the wall of said cylinder near the two cylindrical heads being adapted to receive the separating member and having an inlet and an outlet for the fluid.

2. A rotary motor or compressor, comprising a cylinder, an eccentric p ston therein, a separating member of sector shape for dividing the free space of the cylinder into a suction compartment and a compression compartment-at each revolution of the piston and being provided with a passage for discharging the compressed fluid, and c'ylindrical heads forming the two ends of said member.for pivotal connection with the cylinder and the piston, the wall of said cylinder near the two cylindrical heads being adapted to receive the separating member and having an inlet and an outlet for the fluid.

3. A rotary motor or compressor, comprising a cylinder, an eccentric piston therein,

dividing the free space of the cylinder into a suction compartment and a compression compartment'at each revolution of the piston and being provided with passages of various cross-section, and cylindrical heads forming'the two ends of said member for pivotal connection with the cylinder and the piston, the wall of said cylinder near the two cylindrical heads being adapted to receive the separating member and having an inlet and an outlet for the fluid.

4. A rotary motor or compressor, comprising a cylinder, an eccentric piston therein, a separating member of sector sha e for dividing the free space of the cylin er into a suction compartment and a compression compartment at each revolution of the pisface a recess of sector shape to conform to ton and being provided with passages of the shape of the separating member snugvarious cross-section and cylindrical heads ly fitting therein and an inlet and an outlet 10 forming the two ends of said member for for the fluid.

5 pivotal connection with the cylinder and In testimony whereof I afiix my signature.

the piston, the wall of the cylinder near the two cylindrical heads having in the inner GEORG GUTTNER. 

